Hmm, well, neither Project Moonbase nor Destination Moon is the movie with the skeletons on the moon. The quest continues... (ETA: Lance suggested Moon Zero Two, which does have a skellington on the moon!)
... in the meantime: when we lived in Melbourne (85-86), I used to sit in the car at night and play around with the CB radio. If you twiddled the dial all the way to the right you could sometimes catch a nasal electronic voice announcing "Three three seven five. Three three seven five." Before and after this mysterious statement, there'd be six electronic boops in two groups, high-low-low, high-low-low. The whole thing used to creep the heck out of me.
I've wondered if it was a VOR station, though I think you'd expect some Morse code and probably someone saying "Melbourne Airport", or something along those lines. (CB Radio is around 27 MHz, VHF starts at 30 MHz, so it's not impossible.)
Any thoughts, peeps?